Tests on jdk1.8 fail

I executed quickifix test on jdk 1.6. All went fine. On jdk 1.8 failed:

-------------------------------------------------------------------------------
Test set: quickfix.SessionTest
-------------------------------------------------------------------------------
Tests run: 47, Failures: 6, Errors: 0, Skipped: 0, Time elapsed: 1.514 sec <<< FAILURE! - in quickfix.SessionTest
testSequenceResetStackOverflow(quickfix.SessionTest) Time elapsed: 0.012 sec <<< FAILURE!
java.lang.AssertionError: expected:<51> but was:<50>
at org.junit.Assert.fail(Assert.java:93)
at org.junit.Assert.failNotEquals(Assert.java:647)
at org.junit.Assert.assertEquals(Assert.java:128)
at org.junit.Assert.assertEquals(Assert.java:472)
at org.junit.Assert.assertEquals(Assert.java:456)
at quickfix.SessionTest.testSequenceResetStackOverflow(SessionTest.java:1044)

testResendRequestMsgSeqNum(quickfix.SessionTest) Time elapsed: 0.011 sec <<< FAILURE!
java.lang.AssertionError: Session should be logged out since seqnum too low!
at org.junit.Assert.fail(Assert.java:93)
at org.junit.Assert.assertTrue(Assert.java:43)
at org.junit.Assert.assertFalse(Assert.java:68)
at quickfix.SessionTest.testResendRequestMsgSeqNum(SessionTest.java:1172)

testSimultaneousResendRequests(quickfix.SessionTest) Time elapsed: 0 sec <<< FAILURE!
java.lang.AssertionError: null
at org.junit.Assert.fail(Assert.java:92)
at org.junit.Assert.assertTrue(Assert.java:43)
at org.junit.Assert.assertTrue(Assert.java:54)
at quickfix.SessionTest.testSimultaneousResendRequests(SessionTest.java:1225)

testDontCatchErrorsFromCallback(quickfix.SessionTest) Time elapsed: 0.003 sec <<< FAILURE!
org.junit.ComparisonFailure: expected:<[java.lang.Error: TEST]> but was:<[No error thrown]>
at org.junit.Assert.assertEquals(Assert.java:125)
at org.junit.Assert.assertEquals(Assert.java:147)
at quickfix.SessionTest.testDontCatchErrorsFromCallback(SessionTest.java:1462)

testAcceptorRelogon(quickfix.SessionTest) Time elapsed: 0 sec <<< FAILURE!
java.lang.AssertionError: null
at org.junit.Assert.fail(Assert.java:92)
at org.junit.Assert.assertTrue(Assert.java:43)
at org.junit.Assert.assertFalse(Assert.java:68)
at org.junit.Assert.assertFalse(Assert.java:79)
at quickfix.SessionTest.testAcceptorRelogon(SessionTest.java:1632)

testStateFlagsAreResetOnLogout(quickfix.SessionTest) Time elapsed: 0.001 sec <<< FAILURE!
java.lang.AssertionError: null
at org.junit.Assert.fail(Assert.java:92)
at org.junit.Assert.assertTrue(Assert.java:43)
at org.junit.Assert.assertFalse(Assert.java:68)
at org.junit.Assert.assertFalse(Assert.java:79)
at quickfix.SessionTest.testStateFlagsAreResetOnLogout(SessionTest.java:1670)